The marked white stone is missing in the problem diagram, but present in the solution diagram. In my opinion, it should be present in both, rather than absent in both.
--Dieter
Here is the book's solution
Black lives by setting up the comb formation. This is
possible because Black's move threatens to capture the
4 Black stones on the left.
Black can also start by playing to the left of , in order
to guarantee two eyes.
It seems to me that White can defend his left 4 stones by playing a typical sacrifice in capturing races, gaining one move
Now Black can't throw in and atari, due to a shortage of
liberties, and has to spend an extra move to capture .
I don't see any better result for Black.
--ilan
This error was pointed out to me by my club member Bart Vandeputte (12k). --Dieter 1k
The author writes: if Black at
, then White
- Black a - White
kills him. This is not true.
Black lives with .
White at
, and this is probably what the author meant.
For this problem the author gives the following solution:
followed by:
Unfortunately is a mistake.
Black may play at
here resulting in:
The correct solution is:
now black is short of liberties and cannot connect at a.